The incidence of fetal malformation in China is about 2%, which is not very low, and once a malformed fetus is born, it will bring heavy pressure and burden to the society and family. Therefore, eugenics requires minimizing the birth of malformed fetuses. It is recommended to take folic acid supplements to prevent the incidence of neural tube abnormalities before conception. Pregnant women and those who are pregnant should avoid taking drugs and toxic substances as much as possible, and should follow medical advice to have regular maternity checkups during pregnancy to detect any abnormalities in fetal development.